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Multiplying and Dividing Rationals  Problem 5
Alissa Fong
Alissa Fong
MA, Stanford University
Teaching in the San Francisco Bay Area
Alissa is currently a teacher in the San Francisco Bay Area and Brightstorm users love her clear, concise explanations of tough concepts
Although you technically don't have to reduce fractions before you multiply them, reducing first makes the numbers you'll be working with smaller. If you don't reduce at the beginning, you'll have to do it at the end, anyway. Here, we practice reducing monomial rational expressions first by crossing out any factors that are the same in top and bottom of a fraction first, and then multiplying.
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Alissa Fong
M.A. in Secondary Mathematics, Stanford University
B.S., Stanford University
Alissa has a quirky sense of humor and a relatable personality that make it easy for students to pay attention and understand the material. She has all the math tips and tricks students are looking for.
Your tutorials are good and you have a personality as well. I hope you have more advanced college level stuff, because I like the way you teach.”
Thanks alot for such great lectures... I never found learning this easier ever before... keep up the great work.... :)”
You seem so kind, it's awesome. Easier to learn from people who seem to be rooting for ya!' thanks”
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Sample Problems (10)
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Multiplying and Dividing Rationals
Problem 1 5,621 viewsMultiply and simplify your answer.
3xy² ⋅ 4x³z 10y³ x³z³ 
Multiplying and Dividing Rationals
Problem 2 4,417 viewsMultiply and simplify your answer.
x + 3 (5x² + 10x) 5x² 
Multiplying and Dividing Rationals
Problem 3 4,162 viewsMultiply and simplify your answer.
m² + 5m + 6 ⋅ m² − 2m − 3 m − 3 m² + 3m + 2 
Multiplying and Dividing Rationals
Problem 4 3,822 viewsDivide and simplify your answer.
5t² + 10t − 15 ÷ 2t² + 7t + 3 5 − 6t + t² 4t² − 8t − 5 
Multiplying and Dividing Rationals
Problem 5 498 views 
Multiplying and Dividing Rationals
Problem 7 562 views 
Multiplying and Dividing Rationals
Problem 8 481 views 
Multiplying and Dividing Rationals
Problem 9 479 views 
Multiplying and Dividing Rationals
Problem 10 494 views 
Multiplying and Dividing Rationals
Problem 11 446 views
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